Android APIs
public class

TextDirectionHeuristics

extends Object
java.lang.Object
   ↳ android.text.TextDirectionHeuristics

Class Overview

Some objects that implement TextDirectionHeuristic. Use these with the unicodeWrap() methods in BidiFormatter. Also notice that these direction heuristics correspond to the same types of constants provided in the View class for setTextDirection(), such as TEXT_DIRECTION_RTL.

To support versions lower than JELLY_BEAN_MR2, you can use the support library's TextDirectionHeuristicsCompat class.

Summary

Fields
public static final TextDirectionHeuristic ANYRTL_LTR If the text contains any strong right to left non-format character, determines that the direction is right to left, falling back to left to right if it finds none.
public static final TextDirectionHeuristic FIRSTSTRONG_LTR Determines the direction based on the first strong directional character, including bidi format chars, falling back to left to right if it finds none.
public static final TextDirectionHeuristic FIRSTSTRONG_RTL Determines the direction based on the first strong directional character, including bidi format chars, falling back to right to left if it finds none.
public static final TextDirectionHeuristic LOCALE Force the paragraph direction to the Locale direction.
public static final TextDirectionHeuristic LTR Always decides that the direction is left to right.
public static final TextDirectionHeuristic RTL Always decides that the direction is right to left.
Public Constructors
TextDirectionHeuristics()
[Expand]
Inherited Methods
From class java.lang.Object

Fields

public static final TextDirectionHeuristic ANYRTL_LTR

Added in API level 18

If the text contains any strong right to left non-format character, determines that the direction is right to left, falling back to left to right if it finds none.

public static final TextDirectionHeuristic FIRSTSTRONG_LTR

Added in API level 18

Determines the direction based on the first strong directional character, including bidi format chars, falling back to left to right if it finds none. This is the default behavior of the Unicode Bidirectional Algorithm.

public static final TextDirectionHeuristic FIRSTSTRONG_RTL

Added in API level 18

Determines the direction based on the first strong directional character, including bidi format chars, falling back to right to left if it finds none. This is similar to the default behavior of the Unicode Bidirectional Algorithm, just with different fallback behavior.

public static final TextDirectionHeuristic LOCALE

Added in API level 18

Force the paragraph direction to the Locale direction. Falls back to left to right.

public static final TextDirectionHeuristic LTR

Added in API level 18

Always decides that the direction is left to right.

public static final TextDirectionHeuristic RTL

Added in API level 18

Always decides that the direction is right to left.

Public Constructors

public TextDirectionHeuristics ()

Added in API level 18